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Sweep 22 Oct 2026 · 21:04Z Build v2.1.309 528 read Stable v2.1.308 Latest v2.1.309 Next v2.1.309 Feeds RSS JSON llms.txt llms-full.txt Unofficial
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Claude Code v2.0.77 ·

Slow Operation Detection and Diagnostics

Entry
JSON All of v2.0.77
EntryKind: in v2.0.77,
ChangesSection of the release

Performance monitoring has been added for operations that may cause UI lag or delays:

  • JSON.stringify, JSON.parse, and structuredClone operations now log warnings when they take >200ms
  • fs.writeFileSync operations include size information in slow operation warnings
  • execSync shell commands are monitored for slow execution
  • All slow operations are reported via telemetry for aggregate analysis
Evidence

duA() at line 3224 (slow operation wrapper, contains "[SLOW OPERATION DETECTED]")

Strings lifted out of the shipped bundle, so the claim above can be checked against them.

See this entry in the whole of v2.0.77 →

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